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NeMo CMTS 

User’s Guide 

 

 

 

Summary of Contents for NeMo CMTS

Page 1: ...NeMo CMTS User s Guide...

Page 2: ...010804...

Page 3: ...on of Coresma Ltd The text and graphics are for the purpose of illustration and reference only The specifications on which they are based are subject to change without notice The software described in...

Page 4: ...mbol is intended to alert the user to the presence of non insulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of lethal electric shock t...

Page 5: ...he CMTS must be installed near a wall power outlet Only a certified technician is allowed to connect and disconnect cables to the CMTS Please install the CMTS on a stable horizontal surface that can s...

Page 6: ...igned to work at heights between 200 meters below sea level and to 2000 meters above sea level If the CMTS is brought in from a cold place to a hotter place condensation may occur Wait one hour before...

Page 7: ...alling the NeMo CMTS describes the procedure for installing the NeMo CMTS system and testing an end user site from your location Appendix A Rlogin Commands describes the various system commands used t...

Page 8: ...NEMO CMTS SYSTEM 1 System Components 1 NEMO CMTS DIAGRAM 4 OVERVIEW 5 HOW THE CMTS WORKS 6 NEMO HEADEND UNIT 7 Configuring the CMTS 8 MAIN FEATURES 8 ARCHITECTURE 8 OPERATION AND MAINTENANCE 8 INSTAL...

Page 9: ...1 Preparing the RF Network 23 Preparing the Ethernet Network Parameters 25 PREPARING A LOCAL END USER SITE 26 Installation Configuration 27 INSTALLING THE NEMO CMTS 29 About this Chapter 29 PART 1 SET...

Page 10: ...an directory 49 Freq_hopp_table directory 51 Downchan directory 51 CMTS directory 52 mgmt directory 54 Stats directory 55 ip_cfg directory 57 Boot_cfg directory 58 Radius Directory 58 CM Operation Mod...

Page 11: ...P messages handling 72 DHCP messages handling 72 DHCP Block Mode 72 MULTI MAC AUTHENTICATION IMPLICATIONS 73 MULTI MAC FORWARDER IMPLICATIONS 73 GLOSSARY OF TERMS 74 TECHNICAL SPECIFICATIONS 76 NeMo C...

Page 12: ......

Page 13: ...F cable modem solution NeMo is designed for a distributed node architecture for homes multiple dwelling units campuses executive offices and hotels It is comprised of an intelligent RF bridge and can...

Page 14: ...dend and provides the services of a remote workstation through a classic client server SNMP web based architecture and is comprised of the following components TFTP Services for software upgrades Seri...

Page 15: ...ce allocation algorithm delivers upstream packets at a higher success ratio than modems without such algorithms Low cost enables profitable operation in situations where density issues exist or where...

Page 16: ...4 NeMo CMTS Diagram...

Page 17: ...odem should be 10 dBmV under the video signal in the CATV The standard video signal is 10 dBmV therefore the NeMo modem RF input should be 0 dBmV The splitter at the end user s site splits the CATV co...

Page 18: ...ystem resources The design of the NeMo CMTS originates from its simplicity scalability and management With robust upstream and downstream QPSK modulation system auto software download auto attenuation...

Page 19: ...ere the cable headend broadcasts signals to all subscribers The CMTS therefore broadcasts the downstream traffic and each modem receives its appropriate data The upstream however operates on a differe...

Page 20: ...ignal control for frequency and timing coordination with the headend CMTS The CMTS connects to one downstream modulator and one upstream demodulator this is not a feature The NeMo CMTS separates the R...

Page 21: ...odems System DHCP or static IP enabled Introducing the NeMo Cable Modem NeMo is a user friendly modem ergonomically built to suit the access needs of subscribers Designed to plug and play it does not...

Page 22: ...of the cable network It connects the local server s the IP router and the cable network Note The CMTS connects via Ethernet to the router or an Ethernet smart switch IP Router enables communication f...

Page 23: ...nstream channel frequency The CMTS controls a set of one downstream and one upstream channel Ethernet Bridging The CMTS performs Ethernet bridging between the CATV network and the CATV Ethernet backbo...

Page 24: ...Internet and other on line services to subscribers It handles the downstream and upstream termination The CMTS also manages and controls the entire network in real time It performs real time network m...

Page 25: ...the CATV connection One cable is connected to the end user s TV and the other cable is connected to the NeMo modem Headend Hardware The NeMo CMTS can be configured as a desktop unit on a shelf or tab...

Page 26: ...ipment e g lasers that can be damaged on high levels of upstream power Two parameters define a minimum attenuation for the modems Using these parameters operators can configure their modems to never g...

Page 27: ...frastructure With its highly intelligent upstream allocation algorithm noise detection trigger systems unique Quality of Service ability billing ready structure and Virtual LAN services the NeMo Cable...

Page 28: ...ises via its 10Base T Ethernet ports It interfaces either directly to the user PC or through a local HUB The controller receives downstream data from the downstream receiver and sends data to the upst...

Page 29: ...minal Internet Router System With Management RF Network Remote Bridge Serial Terminal Internet HUB Router Rlogin NCS OC Rlogin NCS OC Management applications RLOGIN Used to remotely configure the CMTS...

Page 30: ...r Site describes the prerequisites needed to test an end user s system from your location Overview In order to install the NeMo CMTS system you must ensure that the environment in which you plan to in...

Page 31: ...er Power supplies CMTS serial cable female to female Coresma Software CD NeMo CMTS User s Guide Basic Configuration The basic configuration of the NeMo CMTS system consists of One NeMo CMTS One comput...

Page 32: ...software or to download new software files from the TFTP server CMTS Code Program The Flash memory contains the CMTS application ram hex and modem code nsu nmc nsu fdp CMTS Application The Modem Code...

Page 33: ...the Management Computer There are four services that the management computer is expected to handle when managing the remote NeMo system These four services are Initialization Service Serial page 22 F...

Page 34: ...ystem FOCS Shared Module is managed via Simple Network Management Protocol SNMP and provides additional management capabilities that empower cable operators to manipulate network parameters TFTP Servi...

Page 35: ...rotocol installed ODBC installed Serial Terminal Needed for first time configuration of the CMTS or to recover from erroneous settings of the CMTS Any RS 232 capable terminal or terminal emulation can...

Page 36: ...Hz to 30MHz The attenuation of the entire cable network both upstream and downstream channels IF RF Agile Modulator Support An Agile Modulator Up Converter is required to transform signals from the IF...

Page 37: ...f the site you must obtain the following information Internet Router Information below Ethernet Network Checklist page 26 Internet Router Information An Internet router is needed for layer 3 routing o...

Page 38: ...Ethernet connection Connect the management computer to the hub and router and make sure that the management computer has access to the Internet A successful connection determines the following o The...

Page 39: ...sted information to Coresma Refer to Chapter 4 Contacting Coresma for contacting instructions Set Up Questionnaire Is the installation going to take place on a closed system at the headend for demonst...

Page 40: ......

Page 41: ...Up the Management Computer s page 35 describes how to configure the CMTS using HyperTerminal TFTP and FOCS Part 3 Setting Up an End User Site page 41 describes how to install the NeMo Modem and set up...

Page 42: ...the connectors that appear on the rear panel of the CMTS Maintenance P C Hub 10Base T connector to be used by trained maintenance personal only IF Out F Connector The downstream data output from the...

Page 43: ...be used for the upstream channel Calibrating the RF Signals and Connecting to the RF Network Once you have attached the CMTS and modulator you are ready to calibrate the RF signals and then connect th...

Page 44: ...s per second field enter 38400 vii Ensure that the Data bits Parity and Stop bits are 8 None and 1 respectively viii Select None from the Flow control field and click on OK ix A window will open and t...

Page 45: ...test point where the client computer will connect to the spectrum analyzer using the test point cable and ensure proper downstream signal shape and level readings on the analyzer with a minimum SNR o...

Page 46: ...nerator 2 Connect the signal generator to the test point 3 Connect the spectrum analyzer to the upstream cable on the CMTS side 4 Obtain the level of the signal generator signal strength and calculate...

Page 47: ...ng to the RF Network After you have attenuated both the upstream and the downstream signals connect both cables to a two way splitter as follows 1 Take the two RF cables with attenuators at the unconn...

Page 48: ...management computer is on and a serial port is available for example COM1 or COM2 The CMTS power is turned OFF Your management computer has HyperTerminal installed Step 1 Connecting the CMTS to the M...

Page 49: ...CMTS to the management computer and router Step 2 Configuring the CMTS 1 Turn the CMTS power ON At this point you should see some activity in the HyperTerminal After this activity stops you will see...

Page 50: ...38 This shell enables you to accurately input first time data into your CMTS 2 Type Help and press Enter A list of the available commands is displayed as shown in the example below...

Page 51: ...ntax is required 4 set parameter name new parameter 2 Note Remember to use lower case letters 5 Next set the CMTS IP parameters This includes the IP address Netmask and Gateway as follows set ipaddr x...

Page 52: ...TS will now start loading the runtime files for RUNNING This action may take up to one minute 2 Note The last number that appears after the download is completed is the MAC address of the gateway of t...

Page 53: ...l at an end user site you must perform the following tasks at the headend and end user sites Headend Site Confirm the CMTS is powered ON Confirm the Network is connected to the CMTS Confirm the RF wir...

Page 54: ...f a RJ45 cable to the computer port 3 Connect the other end of the RJ45 cable to the Ethernet card in your PC 4 Connect one end of the RF cable to the CATV outlet on the modem 5 Connect the other end...

Page 55: ...er named NeMo tool and clicking on the setup exe file To use the NeMo Tool 1 Open the NeMo Tool The NeMoTool dialog box is displayed 2 For a complete description of the tab options available in the Ne...

Page 56: ...the modem starts blinking quickly The orange light on the modem starts blinking slowly This is the lock on frequency and runtime software download procedure and should take approximately 45 seconds 5...

Page 57: ...nd downstream frequencies and symbol rates IP address subnet mask gateway address and so forth The management information is stored in the NeMo CMTS control variables Directories are used to group var...

Page 58: ...ribed below dir Purpose Display information about variables and subdirectories Format dir cd Purpose Change the current directory Format cd directory Examples cd downchan change the current directory...

Page 59: ...boot ROM to restart the boot sequence Format reboot write Purpose Store the NVRam data Format write ls Purpose See dir Format ls Control Variables Root directory mac_address Description CMTS s Ethern...

Page 60: ..._grants Description Total number of slots given to the sid Access Read Example Bridge service show total_data_grants 5 cm_address Description Modem s mac address Access Read Example Bridge service sho...

Page 61: ...y Bridge upchan set frequency 3200 32MHz avr_cnr Description Average Carrier to Noise Ratio Access Read Example Bridge upchan show avr_cnr signal_wnd_center Description Modems are allowed to join the...

Page 62: ...example setting the min_attn_lvl parameter to 5 will cause the modems to attenuate at least 10 dB This will cause for the previous example details the modem range to be between approximately 30dBmV a...

Page 63: ...0 100 Example Bridge upchan show frame_corr_thresh Bridge upchan set frame_corr_thresh 50 Freq_hopp_table directory hopp_freq Description Frequencies for frequency hopping table Access Read Write Vali...

Page 64: ...e modems will use the enabled methods Setting a method to 1 will enable this method Setting to 0 will disable the method Access Read Write Example Set scanner_enabled 1 The following methods are suppo...

Page 65: ...state 1 log level Description The Bridge uses this value to determine if an event is to be reported to the log server Access Read Write Valid values no logging 0 stats only 1 events 2 detailed events...

Page 66: ...between 1 to 3 and AA BB CC DD EE FF is a MAC Address to receive packets from Note The default MAC FF FF FF FF FF FF is ignored Leaving all three addresses with this MAC Address will cause the bridge...

Page 67: ...IP address of the requested management station Note Changes made to community names take effect only after bridge reset If there is at least 1 IP number registered at the bridge only packets from regi...

Page 68: ...due to CRC errors Access Read Example Bridge stats show in_rejects in_pkts Description Total number of number of packets received on upstream Access Read Example Bridge stats show in_pkts in_frags Des...

Page 69: ...ry Any changes made in this directory will take place only after bridge reboot ip_addr Description IP address for the bridge Access Read Write Example Bridge ip_cfg show ip_addr Bridge ip_cfg set ip_a...

Page 70: ...ge ip_cfg show tftp_path Bridge ip_cfg set tftp_path c tftp auto_update Description Set to 1 to enable boot flash update set to 0 to disable it Access Read Write Example Bridge ip_cfg show auto_update...

Page 71: ...ixed_max Bridge radius set down_qos_fixed_max 128 up_qos_fixed_min Description Minimum fixed upstream QoS in Kbytes sec Access Read Write Example Bridge radius show up_qos_fixed_min Bridge radius set...

Page 72: ...ape Internet Explorer etc When the client tries to use these applications the client is redirected to the SRS WEB site If The QOS status is disabled then the client has a low QOS 2 Authentication fail...

Page 73: ...password Bridge radius set password my_password syslog_ip syslog_level Description Configures Syslog Access Read Write Example Bridge radius set syslog_ip ip_address Where ip_address is the IP addres...

Page 74: ...the srs_ip and the srs_fn so usually do NOT set srs_fn to start with a CM Operation Mode directory cm_lock_mode Description If this parameter is enabled modems that cannot join the system due to upst...

Page 75: ...not expired Access Read Write Example Bridge cm_operation_mode show dhcp_block_mode Bridge cm_operation_mode set dhcp_block_mode 0 netbeui_block_mode Description When enabled all traffic carrying UDP...

Page 76: ...ge cm_operation_mode show arp_use_dhcp_gw Bridge cm_operation_mode set arp_use_dhcp_gw 0 pppoe_block_mode Description Setting this parameter to 0 will enable PPPoE traffic Setting this parameter to 1...

Page 77: ...settings show ip_pool_start Bridge nat settings set ip_pool_start 123 123 123 0 ip_pool_size Description Number of IP addresses in the Nat address pool Values 1 255 Access Read Write Example Bridge n...

Page 78: ...fw_status_change Description The firewall Nat Up Time in seconds when the last change at the firewall NAT Status occurred Access Read Example Bridge nat settings show fw_status_change fw_http_server D...

Page 79: ...make this session status from SessionEntry close pending and then destroy it Values 60 3600 seconds Access Read Write Example Bridge nat settings show fw_idle_timeout Bridge nat settings set fw_idle_t...

Page 80: ......

Page 81: ...m Name of parameter In order for changes to take place reboot your computer Note All Configurable boot parameters are used during bridge runtime Parameter Value Description Macaddr Any legal MAC addre...

Page 82: ...shes rftxf An IF frequency between 5 45 MHz for example 2000 for 20 MHz The CMTS s IF downstream frequency rftxsymrate 0 6 82 Mbps 1 9 45 Mbps The CMTS s downstream bit rate rftxatten Between 0 30 The...

Page 83: ...ltiple MAC Detailed Description Modem Identification The modem is identified using its Serial MAC Address This address is guaranteed to be unique in the LAN using the Serial Allocation Mechanism All t...

Page 84: ...e in the ARP messages the modem replaces the originators and destination MAC addresses inside the DHCP header The modem also changes the Client Identifier DHCP Option in the flowing way The five Least...

Page 85: ...ly one PC can be connected to the new modem and the IP of this PC should be registered with this modem at the FOCS subscriber database If more than one PC connected to the modem the modem will fail Au...

Page 86: ...nagement and systems administrator functions Control Center Service Station A lightweight client version of the control center offering functions needed for departments such as customer service accoun...

Page 87: ...ch as facilitation of searching sorting and recombination of data Databases are stored on devices such as hard disks SQL Structured Query Language A database query and programming language ODBC A data...

Page 88: ...2 to 104 F Storage Temperature 40 to 60 C 40 to 140 F Humidity 10 to 90 non condensing Input Voltage Universal 90 to 240 VAC 1 AMP 47 to 63 Hz Regulatory FCC Part 15 Class B CE EN55022 EN 50082 1 Perf...

Page 89: ...dBmV Max 26 dBmV NeMo Modem Downstream Upstream Operating Frequency Range 50 850 MHz 5 45 MHz Resolution 10 0 KHz increments 10 KHz incremen ts Channel Bandwidth 6 MHz 1 8 MHz 2 6 MHz Data Rate 10 Mb...

Page 90: ...on and Operating Environment cont Storage Temperature 40 to 60 C 40 to 140 F Humidity 10 to 90 non condensing Power Supply Stand alone switching Input Voltage 180 to 260 VAC 47 to 53 Hz 88 to 132 VAC...

Page 91: ...and a technical specialist will supply you with a solution or work around or tell you when one will be available International Central Support Center Israel Office hours are 8 00 AM to 6 00 PM Israel...

Page 92: ...P Server 25 DNS Server IP Address 25 Downchan directory 51 Downstream Channels Table 44 Elastream 3 Embedded Code CMTS 15 End User Set Up 41 End User Test Site 41 Ethernet Connection 26 Ethernet Netwo...

Page 93: ...ion 35 Preparation 23 RF Signals Calibrating 31 RLogin 8 Rlogin Application 23 RLogin Commands 45 Root directory 47 Router 25 Runtime 40 Runtime Files 39 Serial Terminal 23 Service directory 48 Settin...

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